I always pick ground war, 9 vs 9 is cool. I have been used to play shooters on pc, where the server caps are much higher than console shooters. Like the battlefield series that has 32 vs 32, of counter strike source that has 22 vs 22, now thats a war.

I do good in normal team death match, 6 vs 6 is easier since it's less chaotic, but i also find it less fun.